Yes. Edit, yes, but if you are dealing with a swap from the SOHC to a DOHC other parts are needed like the motor mount and ECM.
rear of engine compartment near the bulkhead
Very carefully!
On the 1.6L sohc starter is between the engine and fire wall. By the oil filter.
Yes.
Yes, it does.
Answer: The ignition timing on a 1990 Geo Storm is 10 degrees BTDC. This applies to both the SOHC and DOHC 1.6L engines.
there is a answer on robbietherobot.com. Edited: No there isn't. That's spam.
Did it run before?
Geo Storm was manufactured from 1990-1993. Two engines were available the 1600cc SOHC and the 1600cc DOHC while it is possible to switch between one style engine for the other it is rather involved. Other sources for these engines are the Isuzu Stylus for the SOHC or the DOHC or the Isuzu Impulse XS for the DOHC. The Isuzu Impulse RS was a DOHC Turbo which requires considerable modification to install.
Knowing the firing order can help a person troubleshoot engine problems. The firing order for a 1991 Geo Metro is 1-3-4-2.
Inside the alternator
where do you add manuel transmission fluid on a 1991 geo storm 5 speed